On Jul 24, 2009, at 9:45 AM, Jay Kusler <kus...@nscl.msu.edu> wrote:
We currently have a postfix MX front-end that uses MailScanner,
clamav, and spamassassin to preprocess incoming email. We use LDAP
lookups to determine valid recipients. Email that makes it through
all of that gets moved to a Cyrus imap mailstore using LMTP
(mailbox_transport = lmtp:cyrusimap.mydomain.com)
We want to replace the Cyrus backend with Exchange, but keep postfix
as the internet-facing email gateway. Ideally, we would like be
able to move one subset of users (20-30) at a time rather than all
at once (350 users). It seems to me that we should be able to use
the LDAP "mailHost" attribute set to either the Cyrus host or the
Exchange host and have postfix determine what to do based on that
attribute. Does anyone have any suggestions on how to do this?
Use transport_maps to override the Cyrus transport for that subset of
users and direct them to the Exhange transport. You should be able to
construct an LDAP query that returns a desired transport given a
username or email address.. See ldap_table(5).
